Abstract: By using the 1961〖KG-*2〗-〖KG-*7〗2007 observation data of monthly mean temperature, monthly mean maximum and minimum temperature, accumulative temperature of < 0 ℃, ≥ 0 ℃ and ≥10 ℃, and frost-free period from 7 meteorological stations in Dalian, the variation characteristics of these climate indices in last 47 years were analyzed, and the responses of Dalian thermal resources to climate warming as well as the effects of climate warming on the agricultural production in Dalian were studied. In 1988〖KG-*2〗-〖KG-*7〗2007, the monthly mean temperature, monthly mean maximum and minimum temperature, and accumulative temperature of ≥0 ℃ and ≥10 ℃ in Dalian increased markedly, compared with those in 1961〖KG-*2〗-〖KG-*7〗1987. The monthly mean minimum temperature had the largest increment, and the increment was larger in winter than in summer. Therefore, the climate warming in Dalian mainly came from the contribution of the increase of the minimum temperature in winter. The absolute value of accumulative temperature of <0℃ decreased obviously, the first frost date postponed, while the last frost date advanced, resulting an obvious increase of the days of frost-free period. Since the late 1980s, especially in the early 21st century, abnormally warming events more frequently occurred in Dalian, the thermal resources being increased, which would be favorable to the facility agricultural. On the other hand, the survival rates of overwintering diseases and pests increased. Consequently, there would be both advantages and disadvantages of climate warming to the agricultural production in Dalian.

Key words: Brachionus calyciflorus, Culture media filtrate, Colony formation, Growth, Microcystis aeruginosa, Scenedesmus obliquus, Chlorella vulgaris